Medical Physics and Ultrasound

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1. How are kidney stones broken down?

  • Intense beams of strongly ionising X-rays are fired at the stones.
  • A weak concentration of X-rays are fired at the stones.
  • An ultrasound beam concentrates high energy waves at the kidney stone and turns it into sand like particles.
  • Many weak ultrasound waves are reflected off the stones.
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2. What do CAT scans use?

  • Intense beams of X-rays that are strongly ionising
  • Weak beams of X-rays that are strongly ionising
  • Weak beams of X-rays that are weakly ionising
  • Intense beams of X-rays that are weakly ionising

3. What are the medical uses of ultrasound?

  • Breaking down kidney stones, pre-natal scanning of a foetus and measuring the speed of blood flow.
  • Breaking down kidney stones, pre-natal scanning of a foetus, measuring the speed of blood flow and seeing inside the body.
  • Breaking down kidney stones, pre-natal scanning of a foetus and seeing inside the body.
  • Pre-natal scanning of a foetus, measuring the speed of blood flow and seeing inside the body.

4. What is ultrasound?

  • Sound waves with frequencies less than 10kHz
  • Sound waves with frequencies less than 2kHz
  • Sound waves with frequencies above 20kHz
  • Sound waves with frequencies above 10kHz

5. What type of radiation is used in CAT scans?

  • X-rays
  • Visible light
  • Gamma rays
  • Ultrasound

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